Farmers and friends who grow rice know that fertilization is the key to achieving high rice yields.
Main fertilization methods for rice
1. Front light ~ medium heavy ~ rear supplement method
Appropriate application of basal fertilizer and tiller fertilizer, rational application of ear fertilizer, and discretionary application of grain fertilizer to achieve early growth and stable growth, no madness in the early stage, flower promotion in the middle stage, and no premature aging in the later stage. On the basis of ensuring sufficient panicle number, this method simultaneously attacks large panicle and grain weight. This fertilization method is mostly used for single-season late rice and late-maturing middle rice in southern China.
2. Stable in the front ~ attack in the middle
This method saves fertilizer and yields stable and high yields. The main purpose is to increase the effective tillering rate, increase the seed setting rate by attacking large ears, increase the grain weight and strive for high yield. Features: strong plants, large tillers and small groups, control tillers in the early stage; strong stalks, strong roots, medium-sized spikes, medium-to-later attack on seed setting rate and ear weight.
3. Front promotion ~ middle control ~ rear supplement method
This method is similar to the "V"-shaped fertilization method. It applies heavy basal fertilizer (accounting for more than 80% of the total) and heavy application of tiller fertilizer, and applies granular fertilizer as appropriate, so as to achieve a "boom in the early stage, stable in the middle stage, and strong and strong in the later stage". Require. This fertilization method is mostly used in the Northeast rice area, most of the early rice in the South, and wheat stubble rice in North China. The disadvantage is that the growth is too strong in the early stage, which is easy to cause the field to be covered, and the pests and diseases are heavier.
4. Pre-promoting fertilization method
On the basis of applying enough base fertilizer, early and heavy application of tiller fertilizer, especially nitrogen fertilizer, can promote the early growth and rapid development of tiller, and ensure the increase of tiller and more ears. The base fertilizer accounts for 70% of the total fertilizer amount (nitrogen fertilizer accounts for 60% to 80% of the total nitrogen amount), and the remaining 30% fertilizer is fully applied after transplanting and turning green. This method is suitable for rice areas where rainfall is concentrated during rice growth, fertilizer is easily lost, and low temperature and little light are often present. The base fertilizer is mainly farmyard manure.
5. One-step fertilization method of base fertilizer
All fertilizers are applied at one time during the whole field, so that the soil and fertilizer are fully mixed. It is suitable for paddy fields with strong fertility such as clay soil and heavy loam, and the fertilizer source is sufficient. Using this method, compared with the base fertilizer plus tiller fertilizer and base fertilizer plus panicle fertilizer, the nitrogen absorption rate of rice plants increased, the tillering rate was faster, the number of panicles was formed, the light transmittance between the rows was higher, and the yield was increased by 3.6% to 17.9%.
6. Soil testing and formula fertilization
Soil testing and formula fertilization is to coordinate the relationship between crop yield, agricultural product quality, soil fertility and crop environment. According to the law of crop fertilizer demand, soil fertilizer supply characteristics and fertilizer effect, the combination of organic fertilizer and inorganic fertilizer, essential nutrients and trace amounts A set of fertilization technology system with appropriate ratio of elements and corresponding fertilizer application methods. This method can scientifically match various nutrient ratios and application rates according to the results of soil nutrient determination and the amount of various nutrients required by crops for a lifetime, and supply them reasonably to meet the nutrients required by crops for a lifetime, and achieve the purpose of increasing production and efficiency; reducing unnecessary fertilization, reduce costs, reduce environmental pollution, reduce soil compaction and pests and diseases.